Molecular structure ofrac-(4R*,4aS*,10aS*)-4-nitro-1,2,3,4,4a,9,10,10a-octahydrophenanthren-4a-ol, an unusual by-product of nitration of a crude 9,10-dihydrophenanthrene
作者:Franco Fernández、J. López De Lerma、Aurea Perales、Gonzalo Rodríguez
DOI:10.1007/bf01666094
日期:1994.7
AbstractA new nitro-octahydrophenanthrenol has been isolated by nitration of a crude 9,10-dihydrophenanthrene, which was identified by nmr and X-ray diffraction analysis. Crystallographic and molecular structure confirmed the compound as therac-(4R*,4aS*,10aS*)-4-Nitro-1,2,3,4,4a,9,10,10a-octahydrophenanthren-4a-ol. The crystal was triclinic, $$P\bar 1$$ ,a=10.549(3),b=8.530(3),c=7.131(1)Å, α=107.07(3)
摘要 将粗9,10-二氢菲硝化,分离得到一种新的硝基八氢菲醇,并经核磁共振和X射线衍射分析鉴定。晶体和分子结构证实该化合物为 therac-(4R*,4aS*,10aS*)-4-Nitro-1,2,3,4,4a,9,10,10a-octahydrophenanthren-4a-ol。晶体呈三斜晶系,$$P\bar 1$$ ,a=10.549(3),b=8.530(3),c=7.131(1)Å, α=107.07(3), β=91.62(3), γ=96.27(4)°。环己烷和环己烯环是反式稠合的,分别具有椅式和半椅式构象。这些分子通过羟基氧和两个硝基氧之间的氢桥结合。